Air Injection Pump: Description and Operation

The air pump is located underhood near the right front headlamp. The air pump is the main component of the AIR system for California emission level vehicles only. The purpose of the AIR system is to inject air into the exhaust manifold to quickly increase the temperature of the catalytic converters. The air pump creates the pressure needed to inject air into the exhaust manifold. The air pump is controlled by the PCM through the air pump relay in the Underhood Fuse Block (UHFB).